import re
#import urlparse

from bs4 import BeautifulSoup


class HtmlParser(object):
    def parse(self,page_url,html_cont):
        if page_url is None or html_cont is None:
            return
        soup = BeautifulSoup(html_cont, 'html.parser', from_encoding='utf-8')
        new_urls = self._get_new_urls(page_url,soup)
        new_data = self._get_new_data(page_url,soup)
        return new_urls,new_data

    def _get_new_urls(self, page_url, soup):
        new_urls = set()
        links = soup.find_all('a', href=re.compile(r'/item/'))
        for link in links:
            new_url = link['href']
            new_full_url = urlparse.urljoin(page_url,new_url)
            new_urls.add(new_full_url)
        return new_urls



    def _get_new_data(self, page_url, soup):
        res_data = {}
        res_data['url'] = page_url
        res_data['title'] = soup.find('dd', class_= "lemmaWgt-lemmaTitle-title").find('h1').get_text()
        res_data['summary'] = soup.find('div', class_="lemma-summary").get_text()
        return res_data
    
    